crossing over
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crossing over
the exchanging of material between homologous chromosomes, during the first meiotic division, resulting in new combinations of genes.
crossing over
/cross·ing over/ (kros´ing o´ver) the exchanging of material between homologous chromosomes during the first meiotic division, resulting in new combinations of genes.crossing over
orcrossing-over
(krô′sĭng-ō′vər, krŏs′ĭng-)n.
The exchange of genetic material between homologous chromosomes that occurs during meiosis and contributes to genetic variability.
crossing over
the exchange of sections of chromatids between homologous pairs of chromosomes during the prophase stage of the first meiotic division. Crossing over occurs through the formation of chiasmata and results in the recombination of genes. Also called chiasmatypy.
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Crossing over
crossing over
Recombination Vox populi A popular phrase for a change in a person's sexual preference, usually heterosexual → homosexual)
Fig. 123 Crossing over . The exchange of chromatid material.
crossing over
a process occurring in the DIPLOTENE stage of Prophase 1 of MEIOSIS in which there is exchange of nonsister CHROMATIDS, producing genetic RECOMBINATION. (see Fig. 123 ). See also UNEQUAL CROSSING OVER.crossing over
the exchanging of material between homologous chromosomes, during the first meiotic division, resulting in new combinations of genes.